Stackable tray



FIG. 1 is a top perspective view of a stackable tray showing my new design;

FIG. 2 is a bottom perspective view thereof showing the side and end not seen in FIG. 1;

FIG. 3 is a side view in elevation thereof; and

FIG. 4 is an end view in elevation thereof. 

The ornamental design for a stackable tray, as shown and described. 